Power sharing method and base station

ABSTRACT

The embodiments of the present disclosure provide a power sharing method and a base station, wherein the method comprises: according to a power demand of the communication systems of at least one mode among communication systems of different modes sharing a power amplifier, determining whether to perform power sharing among communication systems of different modes; if it is determined to perform power sharing among communication systems of different modes, adjusting an available power of communication systems of one or more modes therein. According to the embodiments of the present disclosure, when it is determined to perform the power sharing according to the power demands, power sharing is performed among communication systems of different modes, thereby realizing dynamic and flexible power sharing among communication systems of at least two modes.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent ApplicationNo. PCT/CN2011/072043, filed on Mar. 22, 2011, which claims priority toChinese Patent Application No. 201010132602.4, filed on Mar. 24, 2010,both of which are hereby incorporated by reference in their entireties.

FIELD OF THE INVENTION

The present disclosure relates to the field of wireless communicationtechnologies, and more specifically, relates to a power sharing methodand a base station that is capable of implementing this method.

DESCRIPTION OF THE RELATED ART

G/U dual-mode base station refers to a base station that cansimultaneously support both a global system for mobile communications(Global System for Mobile Communications, abbreviated as GSM) mode and auniversal mobile telecommunication system (Universal MobileTelecommunications System, abbreviated as UMTS) mode.

However, in the prior art, the maximum transmitting power configured forvarious carriers in the GSM mode and in the UMTS mode is fixed, which isdifficult for realizing flexible power sharing.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure provide a power sharing methodand a base station, in order to realize dynamic and flexible powersharing among communication systems of different modes sharing a samepower amplifier.

One embodiment of the present disclosure provides a power sharingmethod, wherein communication systems of at least two modes share thesame power amplifier, the method comprises:

determining whether to perform power sharing among communication systemsof different modes sharing the same power amplifier, according to apower demand of a communication system of at least one mode in thecommunication systems of different modes;

if it is determined to perform the power sharing among the communicationsystems of different modes, adjusting an available power of thecommunication systems of one or more modes.

Another embodiment of the present disclosure provides a base station,wherein, communication systems of at least two modes share a same poweramplifier in the base station, and the base station comprises:

a share determining module for determining whether to perform powersharing among the communication systems of different modes sharing thesame power amplifier, according to the power demand of the communicationsystems of at least one mode in the communication systems of differentmodes;

a power adjusting module for, if it is determined by the sharingdetermining module to perform power sharing among the communicationsystems of different modes, adjusting the available power ofcommunication systems of one or more modes.

According to the embodiments of the present disclosure, when it isdetermined that power sharing needs to be performed according to thepower demands, power sharing is performed among the communicationsystems of different modes, thereby realizing dynamic and flexible powersharing among communication systems of at least two modes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a power sharing method provided by oneembodiment of the present disclosure;

FIG. 2 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure;

FIG. 3 is a flowchart of a power sharing method provided by a furtherembodiment of the present disclosure;

FIG. 4 is a diagram showing a frame structure when GSM has burst trafficafter the power sharing method provided by the embodiments of thepresent disclosure is performed;

FIG. 5 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure;

FIG. 6 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure;

FIG. 7 is a diagram showing power demand timing of the GSM and the UMTSin the method shown in FIG. 6;

FIG. 8 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure;

FIG. 9 is a structural diagram showing a base station provided by oneembodiment of the present disclosure;

FIG. 10 is a structural diagram showing a base station provided byanother embodiment of the present disclosure;

FIG. 11 is a structural diagram showing a base station provided by afurther embodiment of the present disclosure;

FIG. 12 is a structural diagram showing a base station provided by afurther another embodiment of the present disclosure;

FIG. 13 is a structural diagram showing a base station provided byanother embodiment of the present disclosure.

DESCRIPTION OF THE EMBODIMENTS

In order to make the objects, the technical solutions and the advantagesof the present disclosure clearer, the technical solutions provided bythe present disclosure will be further described in detail, inconjunction with the accompanying drawings and taking the followingembodiments as examples.

Firstly, it needs to be noted that, in the various embodiments of thepresent disclosure, a total carrier power that is allowed to be used canbe configured in advance respectively for communication systems of eachmode, such that a sum of the total power of the communication systems ofeach mode can be equal to a rated power of a power amplifier.

Power configuration for communication systems of various modes can takepower amplifier (Power Amplifier, abbreviated as PA) as a unit and canbe performed within PA. If a plurality of PAs exists, processing isperformed independently within each PA by employing the solutions setforth in the embodiments of the present disclosure, or combinedprocessing is performed among the plurality of PAs, in order to meet alarger power amplifying demand.

FIG. 1 is a flowchart of a power sharing method provided by oneembodiment of the present disclosure. In this embodiment, communicationsystems of at least two modes share a same power amplifier, for example,a communication system of GSM mode and a communication system of UMTSmode share a same power amplifier. As shown in the figure, the methodcomprises:

Step 101, determining whether to perform power sharing among thecommunication systems of different modes sharing the same poweramplifier, according to the power demand of the communication systems ofat least one mode in the communication systems of different modes.

For communication systems of different modes sharing the same poweramplifier, according to the power demand of communication systems of oneor more modes, it can be determined whether there exists remaining powerfor a communication system of a certain mode, such that it candetermined whether power sharing is performed among the communicationsystems of different modes.

Step 102, if it is determined to perform the power sharing among thecommunication systems of different modes, adjusting the available powerof communication systems of one or more modes.

If it is determined that power sharing needs to be performed amongcommunication systems of different modes, the available power ofcommunication systems of one or more modes can be dynamically adjusted.The particular ways for this adjusting can be various, some of which canmake reference to the relevant descriptions of the subsequentembodiments.

According to the method of this embodiment, when it is determined thatpower sharing needs to be performed according to the power demand, powersharing is performed among communication systems of different modes, inorder to realize dynamic and flexible power sharing among communicationsystems of at least two modes.

Additionally, it needs to be noted that, if the communication systems ofat least one mode among the communication systems of different modessharing the same power amplifier also uses other power amplifier(s) atthe same time, then the above adjusting the available power ofcommunication systems of one or more modes comprises: adjusting aproportion of the power of the shared power amplifier and the power ofthe other one or more power amplifiers that is consumed by thecommunication system which uses the other one or more power amplifiersat the same time, thereby reducing the power of the shared poweramplifier that is consumed by the communication system which uses otherone or more power amplifiers at the same time.

Wherein, various ways can be adopted for adjusting a proportion of thepower of the shared power amplifier and the power of the other one ormore power amplifiers that is consumed by the communication system whichuses other one or more power amplifiers at the same time, so long as itcan reduce the power of the shared power amplifier that is consumed bythe communication system which uses other one or more power amplifiersat the same time. For example, it is assumed that the UMTS and the GSMshare a first power amplifier but the GSM also uses a second poweramplifier at the same time, then a proportion of the power of the firstpower amplifier and the second power amplifier that is consumed by theGSM can be adjusted, in order to reduce the power of the first poweramplifier that is consumed by the GSM. Because the total power requiredby the GSM is fixed, when the GSM consumes more power of the secondpower amplifier, the power of the first power amplifier that is consumedby the GSM will become less, such that it is possible to make the powerof the first power amplifier be consumed by the UMTS as much aspossible. One of the ways is preferentially assigning the power of thesecond power amplifier to the GSM as its available power. It is notedthat, demands vary with different configurations, sometimes the power ofthe two power amplifiers should be used evenly. For example, in MIMO(Multiple Input Multiple Output) scenario, the GSM can be caused to usethe power of the first power amplifier and the second power amplifier asevenly as possible. Wherein, a distribution set or other manners can beadopted for sharing power from the GSM to the UMTS.

FIG. 2 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure. In this embodiment, communicationsystems of different modes sharing the same power amplifier are referredto as a communication system of a first mode and communication systemsof one or more other modes. As shown in the figure, the methodcomprises:

Step 201, within a preset period, according to the power demand of thecommunication system of the first mode and the available power of thecommunication system of the first mode, obtaining the sharable remainingpower of the communication system of the first mode.

In particular, the sharable remaining power of the communication systemsof each mode can be obtained in the following ways.

When the preset period arrives, the current power demand is subtractedfrom the total power currently configured for a communication system ofone mode, and the obtained difference is the sharable remaining power;or, when the preset period arrives, the current power demand and thepreserved power are subtracted from the available power currentlyconfigured for the communication system of one mode, and the obtaineddifference is the sharable remaining power; or, a fixed power value or afixed proportion in the total power currently configured for thecommunication system of one mode can serve as the sharable remainingpower.

Wherein, the current power demand refers to the power required by thecommunication system of one mode for maintaining the current operation.For example, the current power demand of the GSM mode refers to themaximum value among the sums of the power required by each time slot ofthe current eight time slots, including pilot transmitting power. In thetime division multiple access (Time Division Multiple Access,abbreviated as TDMA) technology, a frame consists of eight time slots.The GSM pilot transmitting power refers to the power consumed at thetime of transmitting pilot signals in the Broadcast Control Channel(abbreviated as BCCH). Since a pilot signal generally has a function ofproviding forward code division multiple access channel time limit,coherent demodulation phase reference, or the like, it is a veryimportant signal whose transmitting power needs to be kept unchanged,such that this pilot signal will not be regarded as the sharableremaining power for being used by communication systems of other modes.

Wherein, the preserved power refers to an idle power preserved for beingused by one mode, in case for the arrival of predictable burst trafficor being used for meeting power demand of the communication system ofthis mode in the next preset period. This preserved power can be set asany arbitrary numerical value as needed.

It needs to be noted that, the preset period herein can be set asneeded. The above-mentioned communication system of the first mode canbe any one of the communication systems of different modes sharing thesame power amplifier.

Step 202, according to the power demand of communication systems of oneor more other modes, deciding whether to agree to receive the sharableremaining power of the communication system of the first mode.

Specifically, if the network load of the communication systems of one ormore other modes (such as the High Speed Downlink Packet Access(abbreviated as HSDPA) network load) is relatively light, when it isunnecessary to receive the shared power, it is refused to receive theremaining power. Alternatively, if the remaining time during which thisremaining power can be shared is less than the minimum valid time (in aunit of ms) during which this remaining power can be used by thecommunication systems of one or more other modes, it is also refused toreceive the shared power, in order to avoid excessively short use timeof the shared power and low utilization after performing power sharing.Wherein, the remaining time refers to, within a sharing period, a periodof time from determining to share the remaining power with thecommunication systems of one or more other modes for use till the end ofthis sharing period.

Step 203, if the sharable remaining power of the communication system ofthe first mode satisfies a preset sharing condition and the power demandof the communication systems of one or more other modes agree to receivethe sharable remaining power of the communication system of the firstmode, determining to perform power sharing among communication systemsof different modes.

Specifically, if the sharable remaining power of the communicationsystem of the first mode is larger than or equal to a first threshold,it is determined that the sharable remaining power of the communicationsystem of the first mode satisfies the preset sharing condition;alternatively, if a difference between the sharable remaining power ofthe communication system of the first mode and the sharable remainingpower of the communication systems of one or more other modes is largerthan or equal to a second threshold, it is determined that the sharableremaining power of the communication system of the first mode satisfiesthe preset sharing condition. Of course, according to different demands,other ways also can be employed for determining whether the sharableremaining power of the communication system of the first mode satisfiesthe preset sharing condition, and details thereof are omitted. Inaddition, if the sharable remaining power of the communication system ofthe first mode does not satisfy the preset sharing condition, it can bere-determined whether the sharable remaining power of the communicationsystem of another mode satisfies the preset sharing condition; if thesharable remaining power of this communication system of another modesatisfies the preset sharing condition, the power of this communicationsystem can be shared to communication systems of other modes.

For example, it is assumed that the communication system of the firstmode is GSM, if the remaining power of the GSM is larger than or equalto the first threshold, it indicates that the power demand of the GSMmode at this time point is relatively low and a portion of the remainingpower of the GSM can be shared to other modes; otherwise, it indicatesthat the power demand of the GSM mode itself at this time point is alsovery high, and it is not appropriate to share power with other modes,for avoiding the normal operation of the GSM mode itself from beingaffected.

Again, for example, it is assumed that the communication system of thefirst mode is GSM and the communication systems of one other mode isUMTS, if the GSM mode has already shared power to the UMTS mode duringthe previous period, only when a difference between the sharableremaining power of the GSM communication system and the sharableremaining power of the UMTS is larger than or equal to the secondthreshold can the sharing condition be satisfied, such that it isensured that only when the GSM has enough remaining power it sharespower with the UMTS, thereby avoiding power retrieving operation andrepeated power sharing operations from being performed frequently,reducing the burden of the system. In addition to the GSM and the UMTS,there are communication systems of other modes, for example, the LongTerm Evolution (abbreviated as LTE). However, regardless the modes ofthe communication systems, the processing are similar and thus thisembodiment will not describe all of them.

It needs to be noted that, the above description has been made taking asituation in which the GSM shares the power to the UMTS as an example.However, in practical situations, it is also possible that the UMTSshares the power to the GSM. The numerical values of the first thresholdand the second threshold can be set according to actual needs, and theembodiments of the present disclosure will not make any limitations onit.

In addition, if the communication system of the first mode is GSM, itfurther comprises, before obtaining the sharable remaining power of thecommunication system of the first mode in the above-mentioned step 201,deciding whether the number of non-primary B carriers in the GSMcarriers reaches a preset numerical value, if it reaches the presetnumerical value, performing the step of obtaining the sharable remainingpower of the communication system of the first mode; wherein, the presetnumerical value can be any arbitrary positive integer, the primary Bcarrier refers to a carrier that transmits pilot signals while thenon-primary B carrier refers to the carriers other than the primary Bcarriers. In the GSM, in order to guarantee its normal operation,sufficient power will be assigned to the primary B carriers, which thusmay consume a huge amount of available power. When the number of thenon-primary B carriers is sufficiently high, a great amount of remainingpower may be shared to communication systems of one or more other modes,and then the number of the non-primary B carriers can be decided inadvance at the time of deciding whether there has remaining power forsharing. If the number of the non-primary B carriers does not reach thepreset numerical value, the subsequent decision can be avoided.

Step 204, if it is determined to perform the power sharing amongcommunication systems of different modes, the available power ofcommunication systems of one or more modes is adjusted.

If it is determined that power sharing needs to be performed amongcommunication systems of different modes, the available power of thecommunication systems of one or more modes can be dynamically adjusted.The particular ways for this adjusting are various, some of which canmake reference to the relevant descriptions in the subsequentembodiments.

FIG. 3 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure. As shown in the figure, itcomprises:

Step 301, according to the power demand of the communication systems ofat least one mode among the communication systems of different modessharing the same power amplifier, determining whether to perform powersharing among the communication systems of different modes.

The implementation of this step can make reference to the relevantdescriptions in FIG. 1 or FIG. 2, and thus details thereof will beomitted.

Step 302, according to the sharable remaining power of the communicationsystem of the first mode, configuring available power for thecommunication system of the first mode and communication systems of oneor more other modes.

For example, a difference obtained by subtracting the sharable remainingpower from the total power currently configured for the communicationsystem of the first mode can serve as the available power to beconfigured for the communication system of the first mode; and then, onthe basis of the power currently configured for the one or more othermodes, the sharable remaining power is assigned to the communicationsystems of one or more other modes according to a preset rule.

Specifically, assigning the sharable remaining power to thecommunication systems of one or more other modes according to a presetrule can go as follows: if there are multiple communication systems ofother modes, assigning the sharable remaining power to the multiplecommunication systems of other modes in an order of time (for example,at 12:00, assigning the sharable remaining power to the UMTS forsharing; at 15:00, assigning the sharable remaining power to the LTE forsharing); or, according to the priorities of the multiple communicationsystems of other modes, assigning the sharable remaining power to themultiple communication systems of other modes in an order from a highpriority to a low priority; or, assigning the sharable remaining powerevenly to the multiple communication systems of other modes. Wherein,the priority can be determined according to the performances of thecommunication systems, for example, a high priority is provided for acommunication system of a mode to which a problem of insufficient powertends to occur, in order to obtain sharing power preferentially; or thepriority can be determined according to the inclinations of theoperator, for example, if the operator wishes to preferentiallyguarantee the normal operation of the UMTS, then a high priority isprovided for this UMTS system; or, the priority can be determinedaccording to the power demands of the communication systems of thesemodes, the higher the power demand, the higher the priority that will beprovided.

Step 303, sharing the sharable remaining power of the communicationsystem of the first mode to the communication systems of one or moreother modes.

For example, it is assumed that the communication system of the firstmode is GSM, and the communication system of one other mode is UMTS. Inparticular, the available power of the UMTS after obtaining the sharedpower is equal to a sum of the available power of the UMTS beforeobtaining the shared power and the shared power that is agreed to bereceived. Wherein, the shared power that is agreed to be received is aportion of power that the UMTS agrees to receive from the sharableremaining power of the GSM system. Further, the shared power receivedfrom the GSM mode can be used for the HSDPA network in the UMTS mode,wherein, the HSDPA network utilizes the power obtained by sharing fromthe GSM mode. Because the more the power there are, the more theavailable modulation code in the code division multiple accessmodulation manner and the more content is carried, it is possible toenhance the downlink data transmission rate for cell users.

Additionally, it is noted that, if an absolute value of a differencebetween the sharable remaining power of the communication system of thefirst mode obtained when the current preset period arrives and thesharable remaining power obtained when the previous preset periodarrives is less than or equal to a third threshold, the available powerof the communication systems of different modes can be kept unchanged;otherwise, according to the sharable remaining power of thecommunication system of the first mode, available power are configuredfor the communication system of the first mode and the communicationsystems of one or more other modes. Thus, when the remaining power ofthe communication system of the first mode changes greatly, shared poweris provided to the communication systems of one or more other modes;while, when the remaining power of the communication system of the firstmode changes slightly, it is not meaningful to re-perform power sharing,which avoids the configuration of available power from being frequentlyperformed which in turn may add the burden of the system. Theabove-mentioned third threshold can be set according to actual needs aswell.

The above embodiment provides a solution in which the communicationsystem of the first mode provides a long-term power sharing tocommunication systems of other modes, after the communication system ofthe first mode has performed power sharing with the communicationsystems of one or more other modes, the communication system of thefirst mode may have burst traffic, or, it is predicted that theavailable power of the communication system of the first mode cannotsatisfy the power demand of the communication system of the first modeduring the next preset period, power retrieving can be performed. Asituation in which burst traffic occurs will be taken as an example forthe following description.

Below, descriptions are made taking a situation in which the GSM and theUMTS share the same power amplifier as an example, in which, it isassumed that the communication system of the first mode is GSM.

As shown in FIG. 4, it is assumed that the GSM has provided powersharing to the UMTS, PA has configured three GSM carrier frequencies andone UMTS carrier frequency (represented as “G3U1” in FIG. 4), wherein,the dotted line position represents that burst traffic having a powerdemand of 20 W occurs to the GSM carrier frequency at this time point,when the power demanded by this burst traffic exceeds the available idlepower of the GSM mode remaining after the GSM mode has provided sharedpower to the UMTS mode, the current GSM remaining available power cannotsatisfy the demand of this burst traffic, and it is necessary at thistime point to retrieve the power that has been shared to the UMTS modein-time. The hatched portion in FIG. 4 indicates performing a uniformpeak clipping on the carrier frequency in a time slot assigned by theburst traffic, in order to ensure that the total power demand does notexceed the rated power of the PA at the GSM side and meanwhile power areretrieved back to the UMTS side. Thus, another embodiment of the presentdisclosure further provides the following power sharing method.

FIG. 5 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure. As shown in the figure, afterperforming power sharing, it further comprises,

Step 401, when it is detected that burst traffic occurs to thecommunication system of the first mode and the available power of thecommunication system of the first mode does not satisfy the power demandrequired after the burst traffic occurs, it is determined to retrievalpower, according to the available power of the communication system ofthe first mode and the power demand of the communication system of thefirst mode after the burst traffic occurs.

For example, it is assumed that the communication system of the firstmode is UMTS, and the power demand of this UMTS during the next presetperiod is equal to a sum of the UMTS current power demand, the powerdemand at the time of transmitting HSDPA data during the next presetperiod, and the UMTS current remaining power.

Step 402, according to the retrieval power, updating the available powerof the communication system of the first mode and the communicationsystems of one or more other modes.

Specifically, the available power of the communication system of thefirst mode after updating is equal to a sum of the available power ofthe communication system of the first mode before updating and theretrieval power. After completing the updating, power amplification isperformed by the power amplifier based on the updated available power ofthe various systems.

With the method described in this embodiment, when the communicationsystem of the first mode has a busy traffic, the shared power that isshared from the communication system of the first mode to thecommunication system of the second mode can be retrieved dynamically,which thus further improves the flexibility of power sharing and at themost extent avoids posing adverse influences for the performance of thecommunication system of the first mode.

Additionally, it needs to be noted that, since the above process ofpower retrieving has a certain time delay, PA overloading may occurbefore completing power retrieving. Thus, before performing the abovestep 402, the following step can be performed: according to a differencebetween the power demand of the communication system of the first modeand the available power of the communication system of the first mode,reducing the available power of the communication system of the firstmode.

For example, it is assumed that the communication system of the firstmode is GSM. Particularly, calculation can be performed based on thefollowing formula: GSM peak clipping power=GSM power demand−GSMavailable power.

Wherein, the GSM peak clipping power refers to the power to be reducedfrom the GSM available power. The GSM power demand comprises: the powerdemand (including transmitting power required by the pilot signal)before the arrival of the above burst traffic and the power required bythe above burst traffic.

Then, according to the calculated GSM peak clipping power, peak clippingprocessing is performed on the business carrier configured under theGSM. The particular peak clipping processing can perform uniform peakclipping on each business carrier according to the number of thebusiness carriers configured under the GSM. Each business carrier peakclipping power=GSM peak clipping power/the number of the GSM businesscarriers. Wherein, the business carrier refers to the carriers in theBCCH

It needs to be noted that, the above descriptions are made by taking asituation in which burst traffic occurs as an example. It is understoodthat, when it is predicated that the available power of thecommunication system of the first mode does not satisfy the power demandof the communication system of the first mode during the next presetperiod, a similar processing can be used. In such scene, the retrievalpower can be determined according to the power demand within the nextpreset period and the available power of the communication system of thefirst mode.

FIG. 6 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure. As shown in the figure, the methodcomprises:

Step 501, taking the maximum power control period in the communicationsystems of different modes as a unit, within each minimum power controlperiod in the communication systems of different modes, obtaining a sumof the power demands of the communication systems of different modessharing the same power amplifier, wherein, if the sum of the powerdemands is larger than the rated power of the power amplifier, it isdetermined to perform power sharing among communication systems ofdifferent modes.

For example, it is assumed that a communication system of one mode isGSM and the communication system of another mode is UMTS. As shown inFIG. 7, it is a diagram showing the power demand timings of the GSM andthe UMTS, the numbers “0”, e1” . . . “7” in the figure indicate thenumbers of the eight time slots within one TDMA frame. As shown in thefigure, herein, a length (such as, 2 ms) of one time slot of the UMTScan be understood as the maximum power control period, while a length ofthe one time slot of the GSM can be understood as the minimum powercontrol period. For example, within a first 2 ms time slot of the UMTS,a sum of the power demands of the GSM and the UMTS are obtained withinthe time slots of the GSM that are numbered as “0”, “1” and “2”. If theobtained sum of the power demands is larger than the rated power of thepower amplifier, it is determined that power sharing needs to beperformed between the GSM and the UMTS.

Step 502, adjusting the available power of the communication systems ofone or more modes.

For example, it is assumed that a communication system of one mode isGSM and the communication system of another mode is UMTS. The specificprocedure goes as follows:

(1) If the GSM current power demand exceeds the GSM available powerwhile the UMTS current power demand does not exceed the UMTS availablepower, peak clipping processing is performed on the GSM, and the GSMpeak clipping power=the GSM current power demand+the UMTS current powerdemand−the rated power of the power amplifier.

Wherein, performing peak clipping processing on the GSM means reducingthe average transmitting power. “GSM current power demand+UMTS currentpower demand” represents a total power demand of the GSM and the UMTS. Aportion of this total power demand that exceeds the PA rated power isused as the GSM peak clipping power for performing peak clippingprocessing on the GSM, in order to guarantee the power demand of theUMTS.

(2) If the GSM current power demand does not exceed the GSM availablepower while the UMTS current power demand exceeds the UMTS availablepower, peak clipping processing will not be performed in the GSM mode.

(3) If the GSM current power demand exceeds the GSM available power andthe UMTS current power demand also exceeds the UMTS available power,peak clipping processing is performed on the GSM, and GSM peak clippingpower=GSM current power demand−GSM available power.

Since the GSM current power exceeds the GSM available power, theexceeding portion is used as the GSM peak clipping power for performingpeak clipping on the GSM.

When the above communication systems of different modes sharing the samepower amplifier are the GSM and the UMTS, this embodiment can furthercomprise the following steps:

Step 503, if the power of the combined radio-frequency signal of the GSMand the UMTS exceeds the rated power of the power amplifier, waveclipping processing is performed on the UMTS.

For example, after performing peak clipping processing on the GSM instep 502, the combined radio-frequency signal of the GSM and the UMTSstill has a power that may exceed the rated power of the poweramplifier, and thus this step is employed for performing wave clippingprocessing on the UMTS, wherein, the wave clipping processing meansreducing peak-to-average ratio.

With the method described in this embodiment, based on the power controlperiod in the communication systems of different modes, an instantaneouspower sharing is realized, thereby realizing dynamic and flexible powersharing among communication systems of at least two modes.

FIG. 8 is a flowchart of a power sharing method provided by anotherembodiment of the present disclosure. As shown in the figure, the methodcomprises:

Step 601, if the power demand of the communication system having a highpriority among the communication systems of different modes sharing thesame power amplifier exceeds a preset load threshold, it is determinedto perform power sharing among communication systems of different modes.

Wherein, the priority can be determined according to the performances ofthe communication systems, for example, a high priority is provided fora communication system of a mode to which a problem of insufficientpower tends to occur, in order to preferentially obtain shared power; orthe priority can be determined according to the inclinations of theoperator, for example, if the operator wishes to preferentiallyguarantee the normal operation of the UMTS, then a high priority isprovided for this UMTS system; or, the priority can be determinedaccording to the power demands of the communication systems of thesemodes, the higher the power demand, the higher the priority that will beprovided. Of course, the priority of the communication systems can bedetermined by other ways, and this embodiment will not make anylimitations on it.

Step 602, reducing the available power of the communication systemhaving a low priority.

According to the method described in this embodiment, when the powerdemand of the communication system having a high priority among thecommunication systems of different modes sharing the same poweramplifier exceeds the preset load threshold, it is determined to performpower sharing among communication systems of different modes, and theavailable power of the communication system having a low priority isreduced, thereby facilitating that the communication system having ahigh priority can be guaranteed to have sufficient available power.

FIG. 9 is a diagram showing the structure of the base station providedby one embodiment of the present disclosure. As shown in the figure, inthis base station 10, communication systems of at least two modes sharethe same power amplifier in the base station. This base station caninclude a share determining module 11 and a power adjusting module 12,wherein

the share determining module 11 in the base station 10 determineswhether to perform power sharing among communication systems ofdifferent modes sharing the same power amplifier according to the powerdemand of communication systems of at least one modes in thecommunication systems of different modes; when the share determiningmodule 11 determines to perform power sharing among communicationsystems of different modes, the power adjusting module 12 adjusts theavailable power of the communication systems of one or more modes.

If it is determined that power sharing needs to be performed amongcommunication systems of different modes, the available power ofcommunication systems of one or more modes can be dynamically adjusted.The specific ways for this adjusting can be various, some of which canmake reference to the relevant descriptions of the above methodembodiments.

In the base station of this embodiment, when it is determined to performpower sharing according to power demand, power sharing is performedamong communication systems of different modes, thereby realizingdynamic and flexible power sharing among communication systems of atleast two modes.

Additionally, it needs to be noted that, if the communication systems ofat least one mode among the communication systems of different modessharing the same power amplifier also uses other power amplifier at thesame time, the above power adjusting module 12 can adjust a proportionof the power of the shared power amplifier and the power of the otherone or more power amplifiers that is consumed by the communicationsystem which uses the other one or more power amplifiers at the sametime, thereby reducing the power of the shared power amplifier that isconsumed by the communication system which uses other one or more poweramplifiers at the same time. Reference can be made to the relevantcontents in the above method embodiments, and thus details thereof areomitted.

FIG. 10 is a diagram showing the structure of a base station provided byanother embodiment of the present disclosure. As shown in the figure,the share determining module 11 in the base station of this embodimentcan comprise: a power obtaining unit 1101 and a reception deciding unit1102; further, the power adjusting module 12 can comprise a poweroperation unit 1201 and a power distribution unit 1202. Wherein

the power obtaining unit 1101 obtains, within a preset period, accordingto the power demand of the communication system of the first mode andthe available power of the communication system of the first mode, thesharable remaining power of the communication system of the first mode.Specifically, the sharable remaining power of the communication systemsof different modes can be obtained in the following ways.

When the preset period arrives, the current power demand is subtractedfrom the total power currently configured for a communication system ofone mode, and the obtained difference is the sharable remaining power;or, when the preset period arrives, the current power demand and thepreserved power are subtracted from the available power currentlyconfigured for a communication system of one mode, and the obtaineddifference is the sharable remaining power; or, a fixed power value or afixed proportion in the total power currently configured for acommunication system of one mode can serve as the sharable remainingpower.

Wherein, the current power demand refers to the power required by acommunication system of one mode for maintaining the current operation.The preserved power refers to an idle power preserved for being used byone mode, in case for the arrival of predictable burst traffic. Thispreserved power can be set as any arbitrary numerical value as needed.It needs to be noted that, the preset period herein can be set asneeded. The above-mentioned communication system of the first mode canbe any one of the communication systems of different modes sharing thesame power amplifier.

The reception deciding unit 1102 decides, according to the power demandof the communication systems of one or more other modes, whether toagree to receive the sharable remaining power of the communicationsystem of the first mode. If the sharable remaining power of thecommunication system of the first mode satisfies the preset sharingcondition and the communication systems of one or more other modes agreeto receive the sharable remaining power of the communication system ofthe first mode, it is determined to perform power sharing amongcommunication systems of different modes.

Wherein, the reception deciding unit 1102 can decide, according tonetwork load of the communication systems of one or more other modes orthe remaining time during which the remaining power can be shared,whether to agree to receive the sharable remaining power of thecommunication system of the first mode. Specifically, if the networkload of the communication systems of one or more modes (such as theHSDPA network load) is relatively light, and when it is unnecessary toreceive the shared power, it is refused to receive the remaining power.Alternatively, if the remaining time during which this remaining powercan be shared is less than the minimum valid time (in a unit of ms)during which this remaining power can be used by the communicationsystems of one or more other modes, it is also refused to receive theshared power, in order to avoid excessively short use time of the sharedpower and low utilization after performing power sharing. Wherein, theremaining time refers to, within a sharing period, a period of time fromdetermining to share the remaining power to the communication systems ofone or more other modes till the end of this sharing period.

When the share determining module 11 determines to perform power sharingamong communication systems of different modes, the power operation unitin the power adjusting module 12 can use a difference obtained bysubtracting the sharable remaining power from the total power currentlyconfigured for the communication system of the first mode as theavailable power configured for the communication system of the firstmode; and then, the power distribution unit 1202 assigns, on the basisof the power currently configured for the one or more other modes, thesharable remaining power to the communication systems of one or moreother modes according to a preset rule.

Specifically, assigning the sharable remaining power to thecommunication systems of one or more other modes according to a presetrule can go as follows: if there are multiple communication systems ofother modes, assigning the sharable remaining power to the multiplecommunication systems of other modes in an order of time; or, accordingto the priorities of the multiple communication systems of other modes,assigning the sharable remaining power to the multiple communicationsystems of other modes in an order from a high priority to a lowpriority; or, assigning the sharable remaining power evenly to themultiple communication systems of other modes. Wherein, the priority canbe determined according to the performances of the communicationsystems, for example, a high priority is provided for a communicationsystem of a mode to which a problem of insufficient power tend to occur,in order to obtain the shared power preferentially; or the priority canbe determined according to the inclinations of the operator, forexample, if the operator wishes to preferentially guarantee the normaloperation of the UMTS, a high priority is provided for this UMTS system;or, the priority can be determined according to the power demands ofcommunication systems of these modes, the higher the power demand is,the higher priority will be provided.

In addition, after the communication system of the first mode hasperformed power sharing with the communication systems of one or moreother modes, the communication system of the first mode may have bursttraffic, reference can be made to FIG. 4 and its relevant descriptionsfor details of the burst traffic, and thus details thereof are omitted;or, it is predicted that the available power of the communication systemof the first mode cannot satisfy the power demand of the communicationsystem of the first mode during the next preset period; at this timepoint, power retrieving can be performed.

Another embodiment of the present disclosure also provides another basestation. FIG. 11 is a diagram showing the structure of a base stationprovided by another embodiment of the present disclosure. As shown inthe figure, the base station 10 also comprises: a retrieval powerdetermining module 13 and a power updating module 14, wherein:

When it is detected that burst traffic occurs to the communicationsystem of the first mode and the available power of the communicationsystem of the first mode does not satisfy the power demand requiredafter the burst traffic occurs, the retrieval power determining module13 determines the retrieval power according to the available power ofthe communication system of the first mode and the power demand of thecommunication system of the first mode after the burst traffic occurs;or, when it is predicated that the available power of the communicationsystem of the first mode cannot satisfy the power demand of thecommunication system of the first mode during the next preset period,the retrieval power determining module 13 determines the retrieval poweraccording to the power demand within the next preset period and theavailable power of the communication system of the first mode; the powerupdating module 14 updates the available power of the communicationsystem of the first mode and the communication systems of one or moremodes according to the retrieval power determined by the retrieval powerdetermining module.

Specifically, the available power of the communication system of thefirst mode after updating=the available power of the communicationsystem of the first mode before updating+the retrieval power.

With this embodiment, when the communication system of the first modehas a busy traffic, the shared power that is shared from thecommunication system of the first mode to the communication system ofthe second mode can be taken back dynamically, which thus furtherimproves the flexibility of power sharing and to the maximum extentavoids posing adverse influences on the performance of the communicationsystem of the first mode.

FIG. 12 is a diagram showing the structure of a base station provided byanother embodiment of the present disclosure. As shown in the figure,the share determining module 11 in the base station 10 comprises: apower demand obtaining unit 1111 and a share determining unit 1112; thepower adjusting module 12 comprises: a peak clipping processing unit1211 and a wave clipping processing unit 1212, wherein:

The power demand obtaining unit 1111 takes the maximum power controlperiod in the communication systems of different modes as a unit, withineach minimum power control period in the communication systems ofdifferent modes, obtains a sum of the power demands of the communicationsystems of different modes sharing the same power amplifier; if the sumof the power demands is larger than the rated power of the poweramplifier, the share determining unit 1112 determines to perform powersharing among communication systems of different modes. It is assumedthat a communication system of one mode is GSM and the communicationsystem of another mode is UMTS. Reference can be made to FIG. 7 and itsrelevant description for details of the power demand timing of the GSMand the UMTS, and thus details thereof are omitted.

Hereinafter, if the GSM current power demand exceeds the GSM availablepower while the UMTS current power demand does not exceed the UMTSavailable power, peak clipping processing is performed on the GSM by thepeak clipping processing unit 1211, and the GSM peak clipping power=theGSM current power demand+the UMTS current power demand−the rated powerof the power amplifier; and/or, if the GSM current power demand exceedsthe GSM available power and the UMTS current power demand also exceedsthe UMTS available power, peak clipping processing is performed on theGSM, and GSM peak clipping power=GSM current power demand−GSM availablepower. Since the GSM current power exceeds the GSM available power, theexceeding portion is used as the GSM peak clipping power for performingpeak clipping on the GSM. Additionally, if the GSM current power demanddoes not exceed the GSM available power while the UMTS current powerdemand exceeds the UMTS available power, peak clipping processing willnot be performed in the GSM mode.

After the peak clipping unit performs peak clipping processing, if thepower of the combined radio-frequency signal of the GSM and the UMTSexceeds the rated power of the power amplifier, wave clipping processingis performed on the UMTS by the wave clipping processing unit 1212.

For example, after performing peak clipping processing on the GSM instep 502, the combined radio-frequency signal of the GSM and the UMTSstill has a power that may exceed the rated power of the poweramplifier, and thus this step is employed for performing wave clippingprocessing on the UMTS, wherein, the wave clipping processing meansreducing peak-to-average ratio.

With this embodiment, based on the power control period in thecommunication systems of different modes, an instantaneous power sharingis realized, thereby realizing dynamic and flexible power sharing amongcommunication systems of at least two modes.

FIG. 13 is a diagram showing the structure of a base station provided byanother embodiment of the present disclosure. As shown in the figure,the share determining module 11 in the base station 10 comprises: athreshold deciding unit 1121 and a threshold determining unit 1122,wherein:

The threshold deciding unit 1121 decides if the power demand of thecommunication system having a high priority among the communicationsystems of different modes sharing the same power amplifier exceeds apreset load threshold. Wherein, the priority can be determined accordingto the performances of the communication systems. For example, a highpriority is provided for a communication system of a mode to which aproblem of insufficient power tends to occur, in order to preferentiallyobtain the shared power; or the priority can be determined according tothe inclinations of the operator, for example, if the operator wishes topreferentially guarantee the normal operation of the UMTS, then a highpriority is provided for this UMTS system; or, the priority can bedetermined according to the power demands of the communication systemsof these modes, the higher the power demand is, the higher priority willbe provided.

If the threshold deciding unit 1121 decides that the power demand of thecommunication system having a high priority exceeds the preset loadthreshold, the threshold determining unit 1122 determines to performpower sharing among communication systems of different modes.

Hereinafter, when the threshold determining unit 1122 determines toperform power sharing among communication systems of different modes,the available power of the communication system having a low priority isreduced by the power adjusting module 12.

According to the base station described in this embodiment, when thepower demand of the communication system having a high priority amongthe communication systems of different modes sharing the same poweramplifier exceeds the preset load threshold, it is determined to performpower sharing among communication systems of different modes, and theavailable power of the communication system having a low priority isreduced, thereby facilitating that the communication system having ahigh priority can be guaranteed to have sufficient available power.

It needs to be noted that, the base station described in the embodimentsof FIG. 9 to FIG. 13 can be a microcellular base station (MBTS).

One of ordinary skill in the art can understand that, all or part of thesteps for implementing the above method embodiments can be implementedthrough program instruction related hardware. The program can be storedin a computer readable access storage medium, which executes the stepsof the above method embodiments when being executed; the above mentionedstorage medium comprises various media that can store program codes,such as, ROM, RAM, magnetic disk or optical disk.

Finally, it should be noted that, the above embodiments are merely fordescribing the technical solutions of the present disclosure, but arenot intended to limit the technical solutions of the present disclosure.Although the present disclosure has been described in detail withreference to the above embodiments, one of ordinary skill in the artshould understand that, the technical solutions recited in the aboveembodiments can be modified, or some of the technical features thereofcan be equivalently replaced. These modifications and replacements willnot cause the relevant technical solutions to depart from the spirit andscope of the technical solutions of the embodiments.

What is claimed is:
 1. A power sharing method for communication systemsof at least two modes that share a power amplifier, the methodcomprising: determining whether to perform power sharing amongcommunication systems of different modes, according to a power demand ofa communication system of at least one mode among the communicationsystems of different modes sharing a power amplifier, the determiningincluding: (a) within a preset period, obtaining a sharable remainingpower of a communication system of a first mode, according to a powerdemand of the communication system of the first mode and an availablepower of the communication system of the first mode; (b) decidingwhether to agree to receive the sharable remaining power of thecommunication system of the first mode, according to a power demand ofcommunication systems of one or more other modes; and (c) determining toperform power sharing among the communication systems of differentmodes, if the sharable remaining power of the communication system ofthe first mode satisfies a preset sharing condition and thecommunication systems of one or more other modes agree to receive thesharable remaining power of the communication system of the first mode;and adjusting an available power of communication systems of one or moremodes if it is determined to perform power sharing among thecommunication systems of different modes.
 2. The method according toclaim 1, wherein adjusting the available power of the communicationsystems of one or more modes comprises: configuring available power forthe communication system of the first mode and the communication systemsof one or more other modes according to the sharable remaining power ofthe communication system of the first mode, in order to share thesharable remaining power of the communication system of the first modeto the communication systems of one or more other modes.
 3. The methodaccording to claim 2 wherein configuring available power for thecommunication system of the first mode and the communication systems ofone or more other modes according to the sharable remaining power of thecommunication system of the first mode comprises: subtracting thesharable remaining power from a total power currently configured forsaid the communication system of the first mode, and using a differenceobtained thereby as an available power of the communication system ofthe first mode; and based on the power currently configured for thecommunication systems of one or more other modes, assigning the sharableremaining power to the communication systems of one or more other modesaccording to a preset rule.
 4. The method according to claim 1, wherein:the communication system of the first mode is global system for mobilecommunications and the communication system of one other mode isuniversal mobile telecommunications system; and the available powershared by the global system for mobile communications to the universalmobile telecommunications system is used for enhancing a rate ofhigh-speed downlink packet access user.
 5. The method according to claim1, further comprising: when it is detected that burst traffic arrives atthe communication system of the first mode and the available power ofthe communication system of the first mode does not satisfy power demandrequired after the burst traffic arrives, determining a retrieval power,according to the power demand of the communication system of the firstmode required after the burst traffic arrives and the available power ofthe communication system of the first mode, or, when it is predictedthat the available power of the communication system of the first modedoes not satisfy the power demand of the communication system of thefirst mode within a next preset period, determining a retrieval power,according to the power demand within the next preset period and theavailable power of the communication system of the first mode; andupdating the available power of the communication system of the firstmode and the communication systems of one or more other modes, accordingto the retrieval power.
 6. The method according to claim 1, of whereindetermining whether to perform power sharing among communication systemsof different modes sharing a power amplifier according to a power demandof communication systems of at least one mode among communicationsystems of different modes comprises: taking a maximum power controlperiod in the communication systems of different modes as a unit, withineach minimum power control period in the communication systems ofdifferent modes, obtaining a sum of power demands of the communicationsystems of different modes sharing the power amplifier, if the sum ofpower demands is larger than a rated power of the power amplifier,determining to perform power sharing among the communication systems ofdifferent modes.
 7. The method according to claim 1, wherein determiningwhether to perform power sharing among communication systems ofdifferent modes sharing a power amplifier according to a power demand ofthe communication systems of at least one mode among communicationsystems of different modes comprises: if a power demand of acommunication system having a high priority in the communication systemsof different modes sharing the power amplifier exceeds a preset loadthreshold, determining to perform power sharing among the communicationsystems of different modes.
 8. The method according to claim 7, whereinadjusting the available power of communication systems of one or moremodes comprises: reducing the available power of a communication systemhaving a low priority.
 9. The method according to claim 1, wherein ifthe communication systems of at least one mode among the communicationsystems of different modes sharing the power amplifier also uses otherone or more power amplifiers at the same time, adjusting the availablepower of communication systems of one or more modes comprises: adjustinga proportion of the power of the shared power amplifier and the power ofthe other one or more power amplifiers that is consumed by thecommunication system which uses the other one or more power amplifiersat the same time, in order to reduce the power of the shared poweramplifier that is consumed by the communication system which uses otherone or more power amplifiers at the same time.
 10. A base station,wherein communication systems of at least two modes share a poweramplifier in the base station, the base station comprising: a sharedetermining module configured to, according to a power demand of thecommunication systems of at least one mode among communication systemsof different modes sharing a power amplifier, determine whether toperform power sharing among communication systems of different modes;and a power adjusting module configured to, when the share determiningmodule determines to perform power sharing among communication systemsof different modes, adjust an available power of communication systemsof one or more modes; wherein the share determining module comprises: apower obtaining unit configured to, within a preset period, according toa power demand of a communication system of first mode and an availablepower of the communication system of the first mode, obtain a sharableremaining power of the communication system of the first mode; and areception deciding unit configured to, according to a power demand ofcommunication systems of one or more other modes, decide whether toagree to receive the sharable remaining power of the communicationsystem of the first mode; determine to perform power sharing amongcommunication systems of different modes, if the sharable remainingpower of the communication system of the first mode satisfies a presetsharing condition and the communication systems of one or more othermodes agree to receive the sharable remaining power of the communicationsystem of the first mode.
 11. The base station according to claim 10,wherein the reception deciding unit decides, according to network loadof communication systems of one or more other modes or a remaining timeduring which the remaining power can be shared, whether to agree toreceive the sharable remaining power of the communication system of thefirst mode.
 12. The base station according to claim 10, wherein thepower adjusting module comprises: a power operation unit configured to,subtract the sharable remaining power from total power currentlyconfigured for the communication system of the first mode, and use adifference obtained thereby as an available power of the communicationsystem of the first mode; and a power distribution unit configured to,on a basis of the power currently configured for the communicationsystems of one or more other modes, assign the sharable remaining powerto the communication systems of one or more other modes according to apreset rule.
 13. The base station according to claim 10, wherein thebase station further comprises: a retrieval power determining moduleconfigured to, when it is detected that burst traffic arrives at thecommunication system of the first mode and the available power of thecommunication system of the first mode does not satisfy the power demandrequired after the burst traffic arrives, according to the power demandof the communication system of the first mode required after the bursttraffic arrives and the available power of the communication system ofthe first mode, determine a retrieval power, or, when it is predictedthat the available power of the communication system of the first modedoes not satisfy the power demand of the communication system of thefirst mode within a next preset period, according to the power demandwithin the next preset period and the available power of thecommunication system of the first mode, determine a retrieval power; anda power updating module configured to, according to the retrieval powerdetermined by the retrieval power determining module, update availablepower of the communication system of the first mode and thecommunication systems of one or more other modes.
 14. The base stationaccording to claim 10, wherein the share determining module comprises: apower demand obtaining unit configured to, taking a maximum powercontrol period in the communication systems of different modes as aunit, within each minimum power control period in the communicationsystems of different modes, obtain a sum of power demands of thecommunication systems of different modes sharing the power amplifier;and a share determining unit configured to, if the sum of power demandsis larger than a rated power of the power amplifier, determine toperform power sharing among the communication systems of differentmodes.
 15. The base station according to claim 14, wherein thecommunication systems of different modes sharing the same poweramplifier are global system for mobile communication (GSM) and universalmobile telecommunications system (UMTS), the power adjusting modulecomprises: a peak clipping processing unit configured to, if the GSMcurrent power demand exceeds the available power of the GSM while theUMTS current power demand does not exceed the available power of theUMTS, perform peak clipping processing on the GSM, and GSM peak clippingpower equals GSM current power demand plus UMTS current power demandminus rated power of the power amplifier; and/or for, if the GSM currentpower demand exceeds the GSM available power and the UMTS current powerdemand also exceeds the UMTS available power, perform peak clippingprocessing on the GSM, and GSM peak clipping power equals GSM currentpower demand minus GSM available power; and a wave clipping processingunit configured to, after performing the peak clipping processing by thepeak clipping processing unit, if the power of the combinedradio-frequency signal of the GSM and the UMTS exceeds the rated powerof the power amplifier, perform wave clipping processing on the UMTS.16. The base station according to claim 10, wherein the sharedetermining module comprises: a threshold deciding unit configured todecide whether a power demand of a communication system having a highpriority in the communication systems of different modes sharing thepower amplifier exceeds a preset load threshold; and a thresholddetermining unit configured to, if the threshold deciding unit decidesthat a power demand of a communication system having a high priorityexceeds a preset load threshold, determine to perform power sharingamong the communication systems of different modes.
 17. The base stationaccording to claim 16, wherein the power adjusting module is configuredto reduce the available power of a communication system having a lowpriority when the threshold determining unit determines to perform powersharing among communication systems of different modes.
 18. The basestation according to claim 10, wherein if the communication systems ofat least one mode among the communication systems of different modessharing the power amplifier also uses other one or more power amplifiersat the same time, the power adjusting module is also used for adjustinga proportion of the power of the shared power amplifier and the power ofthe other one or more power amplifiers that is consumed by thecommunication system which uses other one or more power amplifiers atthe same time, in order to reduce the power of the shared poweramplifier that is consumed by the communication system which uses otherone or more power amplifiers.